Charles d



(NQ Model.)

o. D. CLARK. MOLDING MACHINE.

y No. 419,639'. Patented Jan. 21,. 1890.

Nv PETERS. PhmwLmmgmphnr. washington. mi)

UNITED STATES PATENT OFFICE.

CHARLES D. CLARK, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE WILLIAM DEERING da COMPANY, OF SAME PLACE.

IVIOLDING-QIVIACHINE.

SPECIFICATION forming part of Letters Patent No. 419,639, dated January 21, `1890. l

Application filed September 29, 18813. Serial No. 286,742. (No model.)

To all whom t may concern,

Be it known that I, CHARLES D. CLARK, a citizen of the United States, residing at Chicago, county of Cook, and State of Illinois, have invented certain new and useful lmprovements for lVIolding-IVIachines, which are fully set forth in the following specieation, reference being had to the accompanying drawings, forming a part thereof.

In the drawings, Figure l is a plan of my molding-machine with the patterns for a common hand-wheel secured therein, a piece of the follow-board being broken away about one pattern. Fig. 2 is a longitudinal section through the same, showing the molding-sand in position about the pattern in one half of the machine, and showing the sand mold withdrawn from the pattern and bearing the reverse impress of it in the other half of the machine. Fig. 3 is a side elevation of the parts in the position shown in Fig. 2. Fig. 4 is a section at the line 4 4 on Fig. l.

A is the frame, which is an oblong parallelogram comprising' the vertical sides A and the ends A2, and supported by four standards D D D D, secured to it at the four corners. The ends A2 have the outwardly-extending flanges A20. The side bars A are joined by the transverse bars A10 A10,which are joined at the top by the horizontal web A11,and the said side bars are further connected by the transverse fiat bars A12 A12 A12 A12. The ends A2 and the transverse bars A10 guide the follow-boards. The lower edges of the side board Aare cutaway at a d a a', and between said eut-away portions are turned outward and up to form the channeled slide-bearing A12, in which devices for lifting the follow-board obtain bearin g, as hereinafter particularly described. 1

B B are follow-boards formed with'the downwardly-extending Hang-es B B', which lit between and are guided by the ends A2 and the vertical cross-bars A10, respectively. The followboards extend out over the upper edges of the side bars A A and have downwardly extending flanges B2B2outside said side bars, which flanges are cut away, leaving the wedgeshaped cam portions B20 B20, having the slanting under edges Z220, as seen in Fig. 3. Said 5o dan ges directly overhang the ehann eled slideslides C.

bearings A13of the frame A, and between them and said bearings, respectively, is located the slide C,eomprisin g thetwo wedge-shaped cams C C correlative to the wedge-shaped cam portions B20B20 of the flanges B2. These cams C are connected by the crossbars C2 C2, which extend underneath the frame A from side to side, crossing the under edge of the side bars A in the cut-away portions a', and to the under side of said cross-bars midway in the width of the frame A there is secured the rack C3. Y

In the two standards D D, at each end of the machine, there is journaled a shaft E, to which there is secured a handle E and a segment-gear E2, which meshes with the rack C3, the handle serving to rock the shaft and segment-gear and cause the latter to actuate the rack and to carry with it longitudinally the To the upper side of said followboards B there is secured the flask F, for retaining the molding-sand and mold when completed. The iasks F have the horizontal anges F', which lap the flanges A20 and the web A11 of the frame A. One of the flasks has the doWel-pins f secured in its flange F and the other has in a corresponding position holes adapted to admit similar dowel-pins f ,which are secured in the web A11 and flange A20 of the frame. These pins are for the familiar purpose of guiding the two flasks together when they are placed face to face. They also serve to fix the exact position of the iiasks on the followboards; so that when two asks are united the two parts of the mold formed in them respectively are accurately matched together.

The operation of this mechanism will be obvious upon inspection; but for further certainty it will be described. The patterns,which are made in mated pairs, each of which is adapted to produce one half of a mold for casting the desired article, are secured to the cross-bars A12 of the frame, as shown in Fig. 2. Preferably the machine is made double, as shown, so that in each half there may be formed a mold of the two parts of the article to be cast, said parts being arranged in opposite order in the two portions of the machine, so that the double half-molds thus made, being applied to each other face to face, form IOO two complete molds of the desired article. The apparatus `being first in the position shown'in the left half of Fig. 2, the follow-board being at its lowest position and the flask resting upon the frame A, patterns being secured in position and the sand tamped in above them, the operator, by means of the handle E rocking the shaft E and the segment-gear E2, causes iv the slides C2 to move longitudinally in Vtheir bearings A13, and their upper sloping edges C', engaging the lower sloping edges B20 of the flanges B2, force the follow-boards and flasks directlyT upward, carrying the mold away from the pattern. The mold being thus completelyfreed of the pattern and the corresponding half being at the same time in a similar manner formed in the otherhalf of the machine, the tWo half-'molds are ready to be 4applied face toface and ,made readyfor the metal.'

Il claim- 'i 1. In a vmolding-inachine,.in combination with the frame A, having the patterns secured thereto, and the horizontal slide-bearings A10, 1 the follow-board B, having the cams B20overh an gingisaid rslide-beyarings, respectively, and

the slide-cams C interposed between said slidelbearings and said ca'ms B20 on vthe fol- W-boards, substantially'as and for the purpose set forth.

2. In a molding-machine, in combination with the frame having the side bars A', and support-s for'securing the pattern thereto and having the horizontal slide-bearings A13, the follow-boards having vertical guide-bearings on said frame and having the cams B overhanging said guide-bearings A13, and the correlated sliding cams C interposed between the cams B20 and the slide-bearings, respectively, said correlated cams being rigidly connected, and means, substantially as described, for actuating 'them longitudinally with respect to said slide-bearings, substantially as In testimony whereof I have set 'my hand V in the presence oftiv WitrissesfatChicago,

Illinois, this Qjltli day ot' September, AQDLISSS.

, v C. D. CLARK. Witnesses:

A. L. UPToN, ARTHUR JoHNsolN. 

